Pure Cotton Cloud Feel Double Layer Dormitory All Cotton Wood Cotton Quilt Cover Soft Breathable Durable Bedding Essential

I paid 1790, as if for a bedding set, but only a duvet cover arrived. I want clarification, is this one duvet cover worth this amount, or were the other items - a sheet and 2 pillowcases - simply not included?? The quality and color are very good, I would like to have a whole set.